gmp.examples.html

来自「php的帮助文档,涉及到PHP的案例和基本语法,以及实际应用内容」· HTML 代码 · 共 38 行

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head>  <title>Examples</title>  <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="gmp.constants.html">Predefined Constants</a></div> <div class="next" style="text-align: right; float: right;"><a href="ref.gmp.html">GMP Functions</a></div> <div class="up"><a href="book.gmp.html">GMP</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div> <h1>Examples</h1> <p class="para">  <div class="example">   <p><b>Example #1 Factorial function using GMP</b></p>   <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB">&lt;?php<br /></span><span style="color: #007700">function&nbsp;</span><span style="color: #0000BB">fact</span><span style="color: #007700">(</span><span style="color: #0000BB">$x</span><span style="color: #007700">)&nbsp;<br />{<br />&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">$return&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">1</span><span style="color: #007700">;<br />&nbsp;&nbsp;&nbsp;&nbsp;for&nbsp;(</span><span style="color: #0000BB">$i</span><span style="color: #007700">=</span><span style="color: #0000BB">2</span><span style="color: #007700">;&nbsp;</span><span style="color: #0000BB">$i&nbsp;</span><span style="color: #007700">&lt;&nbsp;</span><span style="color: #0000BB">$x</span><span style="color: #007700">;&nbsp;</span><span style="color: #0000BB">$i</span><span style="color: #007700">++)&nbsp;{<br />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><span style="color: #0000BB">$return&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">gmp_mul</span><span style="color: #007700">(</span><span style="color: #0000BB">$return</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$i</span><span style="color: #007700">);<br />&nbsp;&nbsp;&nbsp;&nbsp;}<br />&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;</span><span style="color: #0000BB">$return</span><span style="color: #007700">;<br />}<br /><br />echo&nbsp;</span><span style="color: #0000BB">gmp_strval</span><span style="color: #007700">(</span><span style="color: #0000BB">fact</span><span style="color: #007700">(</span><span style="color: #0000BB">1000</span><span style="color: #007700">))&nbsp;.&nbsp;</span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">?&gt;</span></span></code></div>   </div>  </div> </p> <p class="para">  This will calculate factorial of 1000 (pretty big number)  very fast. </p></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="gmp.constants.html">Predefined Constants</a></div> <div class="next" style="text-align: right; float: right;"><a href="ref.gmp.html">GMP Functions</a></div> <div class="up"><a href="book.gmp.html">GMP</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>

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